1NOW		date
authors
compound		source
symmetry		R_factor R_Free
crystal cell	length a length b length c angle alpha angle beta angle gamma
method	X-Ray Diffraction	resolution
ligand	GOL, IFG, NAG, SO4	enzyme
note	1NOW is a representative structure
related structures	by homologous chain: 1O7A
Gene Ontology	Chain Function Process Component B, A
Primary reference	Crystal structure of human beta-hexosaminidase B: understanding the molecular basis of Sandhoff and Tay-Sachs disease., Mark BL, Mahuran DJ, Cherney MM, Zhao D, Knapp S, James MN, J Mol Biol 2003 Apr 11;327(5):1093-109. PMID:12662933

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (165 Kb) [Save to disk] Biological Unit Coordinates (1now.pdb1.gz) 159 Kb Biological Unit Coordinates (1now.pdb2.gz) 160 Kb LPC: Ligand-Protein Contacts for 1NOW CSU: Contacts of Structural Units for 1NOW Likely Quarternary Molecular Structure file(s) for 1NOW Structure Factors (573 Kb) Retrieve 1NOW in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1NOW from S2C, [Save to disk] Re-refined 1now structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1NOW in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1now] [1now_A] [1now_B] SWISS-PROT database: [P07686]

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